HVO field engineer and gas geochemist check equipment
By Mauna Loa
![Color photograph of scientists checking instrument](https://d9-wret.s3.us-west-2.amazonaws.com/assets/palladium/production/s3fs-public/styles/full_width/public/thumbnails/image/img7693_666w_900h.jpg?itok=pYEyZnHM)
Detailed Description
An HVO field engineer and gas geochemist check the wire and tubing connections in the updated gas sensor equipment.
Sources/Usage
Public Domain.